Bush-hammer.



W. J. ERTLE.

BUSH HAMMER.

APPLICATION FILED SEPT.15, 1911.

Patented Feb. 27, 1912.

3 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH C0-.\vAsmNnTON. D. c.

Patented Feb. 27, 1912.

www m %Wmmom COLUMBIA PLANOGDAPN $0., WASHINGTON. n. c.

' W. J. ERTLE.

BUSH HAMMER.

APPLICATION FILED SEPT. 15, 1911.

Patented Feb.27, 1912.

3 BHEBTS-BHBET 3.

WILLIAM JOHN ERTLE, 0F ROCKLIN, CALIFORNIA.

BUSH-HAMMER.

Specification of Letters Patent.

Patented Feb. 2'7, 19173.

Application filed September 15, 1911. Serial No. 649,471.

To all whom it may concern Be it known that I, WVIL IAM JOHN ERTLE, a citizen of the United States, residing at Rocklin, in the county of Placer and State of California, have invented certain new and useful Improvements in Bush-Hammers; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in bush hammers.

One object of the invention is to provide a bush hammer having an improved means whereby the bits or blades thereof are re movably secured to the head of the ham-i mer, without boring or perforating the blades thereby enabling ablade, or blades, to be easily removed, or replaced, without disturbing the otherblades.

Another object is to provide a hammer of this character having an improved means for detachably securing the handle to the head of the hammer.

With these and other objects in view the invention consists of certain novel features of construction, and combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure l is a side view of my improved bush hammer as constructed for operation by machine power; Fig. 2 is an edge view of the same; Fig. 3 is a horizontal sectional view taken on the line 3-3 of Fig. 1; Fig. 4 is a detail side view of the handle and the means whereby the same is secured in the head of the hammer; Fig. 5 is an inner side view of one of the side plates or members of the head; Fig. 6 is .adetail perspective view of one of the blades or bits of the hammer; Fig. 7 is a side view of the hammer as arranged for use by hand power; Fig. 8 is an end view thereof; Fig.9 is a cross sectional view on the line 9-9 of Fig. 7; Fig. 10 is an inner side view of one of the side plates or members of the head; Fig. 11 is a detail side view partly in section of the handle attachingmember of the head; Fig. 12 is a detail perspective view of one of the blades or bits of the hammer. Fig. 13 is a side view of a modified form of the hand bush hammer shown in Fig. .6; Fig. 14 is a central vertical sectional view of thesame; Fig. 15 is .a detail perspective view of one of the blades or cutters em-- ployed in connection with the last form of hammer.

. Referring more particularly to the first six figures of the drawings wherein the invention is shown as constructed and arranged for the application of machine power, 1 denotes the head of the hammer which consists of fiat clamping plates 2 having on their inner sides adjacent to their edges, right angular-1y disposed flanges 3 in which are formed notches or recesses 4 the purpose of which will be hereinafter described. In the plates 2 are formed alined bolt holes 5 and holes 6 to receive the usual supplemental guide handle (not shown).

The plates 2 of the head are adapted to receive between them a flat rectangular block 7 on the inner end of a handle 8. The rectangular block 7 of the handle is disposed in the upper portion of the plate 2 and on the opposite edges of the block 7 are formed rectangular lugs 9 which are adapted to engage-the recesses 4 in the flanges 3 as clearly shown in Fig. 2 of the drawings. In the rectangular portion 7 of the handle are formed a bolt hole 10 and a hole 11, said holes being adapted to aline respectively with the holes 5 and 6 in the plates. The

handle 8 may be of any desired length and is adapted to be engaged with the operating machine in the usual or any suitable manner.

The plates 2 of the head are secured to the rectangular portion 7 of the handle by a clamping bolt 12 which is engaged in the bolt holes 5 and 10 in the plates and rectangular portion of the handle as shown.

Arranged in and clamped between the outer portions of the plate 2 are a series of parallel longitudinally extending blades or bits 14 of which there may be any suitable number, said bits or blades having their outer ends beveled on their opposite sides to form cutting edges 15. The inner ends of the blades or bits 14 project into the space formed between the plates 2 and flanges 3 below the inner end of the rectangular portion 7 of the handle, and are securely clamped or fastened in position by the clamping bolt 12 as shown. The combined width of the flanges 3 on the plates 2 is slightly less than the thickness of the full set of removable blades or bits so that a narrow space is left between the adjacent inner edges of the flanges, said space permitting the plates to be clamped into firm engagement with the rectangular portion 7 of the handle and with said blades.

In Figs. 7 to 12 of the drawings the invention is shown as constructed in double form and for use by hand power. This form of the invention comprises a head 16 consisting of a pair of clamping plates 17 having on their inner sides adjacent to their opposite ends pairs of inwardly extending flanges 18 between which are formed spaces 19 the purpose of which will be hereinafter described. In the plates 17 on opposite sides of the center are formed bolt holes 20.

Adapted to be clamped between the plates 17 is a handle receiving block 21 having formed on its opposite ends lugs 22 which are adapted to engage the spaces 19 between the inner ends of the flanges 18. In the block 21 on opposite sides of the center thereof and in line with the bolt holes 20 in the plates 17 are formed bolt holes 23. Adapted to be engaged with the bolt holes 20 and 23 are clamping bolts 24 by means of which the plates 17 are clamped into operative engagement with the block 21. Through the center of the block 21 is formed a longitudinally disposed handle receiving passage 25 with which is adapted to be engaged a suitable handle 26 whereby the hammer is operated by hand.

Adapted to be clamped between the opposite ends of the plates 17 are series of blades or bits 27 the inner ends of which fit between the flanges 18 and engage the ends of the block 21 as shown. The outer portions of the blades or bits 27 project a suitable distance beyond the ends of the plate 17 and have their outer ends beveled on their opposite sides to form cutting edges 28.

In the last three figures of the drawings is shown a modified construction and arrangement of the hand bush hammer. In this form of the invention the head or tool holding parts of the hammer are practically the same as the head or tool holding part-s shown in Figs. 7 and 8 and the same reference numerals have been placed on the corresponding parts of the head shown in the last figures as those shown in Figs. 7 and 8. A further description of these parts is not thought to be necessary. In the last form of the invention the blades or bits 29 are of greater width than the blades or bits 27 of the other form of hand hammer, and the inner ends of said blades 29 are reduced to form attaching shanks 30 which fit between the flanges 18 and sides of the plates 17. The reduced shanks 30 form offsets or shoulders 31 on the edges of the blades, said offsets or shoulders engaging the outer ends of the flanges 18 as clearly shown in Fig. 14: of the drawing. The side edges of the blades 29 when thus engaged between the plates 17 of the head will be flush with the outer surface of the flanges 18 thus enabling the blades to cut or work in corners or close up against a wall where the blades 27 and the hammer shown in Figs. 7 and 8 could not be employed.

In all the forms of the invention it will be noted that the lugs 9 and 22 formed respec tively on the rectangular block 7 of the handle 8 of the first form of the invention and on the handle receiving block 21 of the last form of the invention when engaged with the flanges on the plates forming the head of the tool, cause the force of the blow or the stroke of the hammer to be applied directly to the side plates of the head and to the blades or bits thus relieving the clamping bolts of any sheering action which would result should the force of the blow or stroke of the hammer be applied to the bolts. It will also be noted that by constructing and arranging the clamping plates and securing the same together in the manner described that the blades or bits will be securely clamped and fastened between the plates forming the head of the hammer and that any of the blades or bits may be removed by simply loosening the clamping bolts. This manner of fastening the bits or blades also obviates the necessity of boring or forming bolt holes in the blades thus lessening the expense of producing the same and also decreasing the time and labor required for changing the blades.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle 'or sacrificing any of the advantages of the invention as claimed.

Having thus described my invention, what I claim is: j

1. In a bush hammer, a head comprising a pair of clamping plates having registering *bolt holes therein, edge flanges on the inner sides of the plates projecting inwardly therefrom, a handle block between said plates having bolt holes therein, lugs projecting from the block engaging between the flanges on the plates, clamping bolts in the bolt holes in the plates, and block, and a series of blades clamped between the plates by the bolts.

2. In a bush hammer, a head comprising a pair of clamping plates having registering bolt holes therein, edge flanges on the inner sides of the plates projecting inwardly therefrom, a handle block between said plates having bolt holes therein, lugs proj ecting from the block engaging between the flanges on the plates, said block and lugs being provided with a transverse handle opening, a handle secured in said opening, clamping bolts in the bolt holes in the plates and block, and two series of blades between and projecting beyond the ends of the plates with their inner ends abutting against the handle block.

3. In a bush hammer, a head comprising a pair of clamping plates having registering bolt holes therein, edge flanges on the inner sides of the plates projecting inwardly therefrom, a handle block between said plates having bolt holes therein, lugs projecting from the block engaging between the flanges on the plates, said block and lugs being provided with a transverse handle opening, a handle secured in said opening, clamping bolts in the bolt holes in the plates and block, and two series of blades between and projecting beyond the ends of the plates with their inner ends abutting against the handle block, the parts of the blades between the plates fitting between opposite edge flanges, and the parts projecting beyond the ends of the plates being equal in width to the plates and provided with shoulders abutting on the outer ends of the flanges.

in testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM JOHN ERTLE.

Witnesses:

VVILLIAM N IooL, SAMUEL G. JOHNSTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

